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PERIOPIC AND IN-SERVICEINSPECTION PROGRAMS

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PERIODIC AND IN-SERVICEINSPECTION PROGRAMS

The Periodic and In-Service is widelyspread to all the station different si(see next diagram)

Following is a short presentation and thecurrent status for each part of these periodicand in-service programs

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Periodic / In-ServiceInspection Programs

PERIODIC INSPECTIONSOFCANDU N.P.R

COMPONENTSCSAN N-285.4

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SAFETY & RELIEFVALVES TESTING

PERIODIC / IN-SERVICEINSPECTION PROGRAM

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PERIODIC INSPECTIONOFCANDU N.P.P.

CONTAINMENT COMPON ENTCSAN N-285.5

IN-SERVICEINSPECTION

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PRESSURE VESSELIN-SERVICE INSP,

PROGRAM

EROSION/CORROSION

IN-SERVICE INSP.PROGRAM

SUPPORTS ANDSNIIBBERS

IN-SERVICE INSP.PROGRAM

REPAIRS;/1"f X ^

1. Periodic Inspection Program forN.P.P. Components, as per CSAN285.4

Periodic Inspection is defined as the mandatory inspectioncarried out on nuclear power plant equipment whosefailure could cause a radioactive hazardThe pre-startuf> of P&riodic Inspection is Inaugural .Inspection, which jn&vides data on initial conditions ofplant componentsSubsequent to Inaugural Inspection is ConfMiiatoryInspection, performed after component hydrostatic test

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2. Periodic Inspection Programfor Containment Components,

asperCSAN285.5

Thfc purpose of such program is to ensure that all containmentcomponents are able to fulfil the leak tightness and in case of accident,maintain the release of radioactivity to minimum.The schedule md the content of the inspection depend on many factors;such R/B Leak Rate Test frequency, Integrity Test frequency, System ,History, other utility programs,* etc.The Periodic Inspection Program defines the inspections required toprovide assurance of the improbability of structural failure ofcontainment components when the containment system is called uponto perform its function as designed.Inspection is intended to detect changes in the structural integrity ofthe system that would impair this function*

Periodic Inspection ProgramDocument (PIPD)

PIPD establishes the program forand Periodic InspectionAdherence to the PIP becomes mandatoryon approval by regulating authorities

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PIPD contains information on:

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Selection of systems and components forinspection

Determination of inspection category

Selection,location $td extent of inspection afea|!and their inspection #equencyInspection methods SAd techniques proposed forinspection ,

System subject to Inspection:

a) Systems and systems connected thereto, containingthe fluid that, under normal conditions* directly*transport heat from nuclear fuel

b) Systems essential for safe shutdownand/or the safe cooliftg of nuclear fuel, in the evenf#of a process failure

c) Systems whose failure could jeopardise theintegrity of a) and b)

d) Systems subject to inspection are:33100 (PHT), 33320 (PIC), 33410 (SC), 34320 (ECC)

Periodic Inspection ProgramIntervals

A complete periodic inspection shall be made i4 year period commencing 1 year after thegeneration of first net power ; ' -::*MX,H> §K>

Subsequent periodic inspections shall be planned^for time intervals that do not exceed 1/3 of the v :

design operational life of the plant, of 10 years,whichever is shorter

Current Status

RD-01365-P9 Periodic Inspection Program-Approved

79-03550-5001-PIPD-ApprovedBoth Inaugural and Confirmatory Inspection Programs werecompleted and reported in IR-04160-01Periodic Inspection Program NPP Components - first interval plan:July 1997 - June 2001, IR-03641-02 - Approved.

597 sites were selected for inspection.During 1997-1999 outages 363 sites were inspected (approx. 60%from first interval plan).

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Current Status

Containment Program under preparation

Information is being gathered on containment boundarypenetrations for piping, electrical, mechanical and sparesAssessment for inspection at each penetration will be done

To continue with program formulation, technical data mustbe gathered from technical group for system stress analysis,service loads, corrosion related cracking, etc.

During 2000 Outage, a number of 27 sites will be inspected.

The Containment Program willcontain information on:

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Identification of systems and components subjectto inspectionAssessment of components for inspection

Selection of inspection methods

Determination of inspection area and extent

Scheduling the inspection

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3.; Erosion / Corrosiont-Servk# Inspection Program

<£>.Tli^Btirooseof this program is to detect damagesbefore w^navi & break-downThis prograrii is required to detect and monitor theerosion / corrosion phenomena, in order to ensurethe integrity of piping systems during the plant life

This program will be applied mainly on secondaryside in the T/B (pipes, reductions, elbows, Ts andvalves)

1 Current Status

• SI-01365-P60 Erosion / Corrosion In-ServiceInspection Program issued and approved.

• 100 sites were selected for inspection andthickness monitoring, on 5 piping systems.

• 60 sites inspected until now.• During 2000 outage, a number of 40 sites will be

inspected.

4. Pressure Vessel In-ServiceInspection Program

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"shsure the safe and reliable operation of pressurevessels, kspeotions are performed at periodic intervalsduring their opmting life

In accordance with ISCIR Technical Specifications,Authorisations to Ojterate are issued by ISCIR, based onthe acceptance results of these inspections

The In-Service Inspection of Pressure Vessel is performedduring operation or shutdown of station, on equipment orcomponents other than those included in the MandatoryInspection and selected based on their performancerequirements

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Current Status

SI-01365-P29 Pressure Vessel In-ServiceInspection Program issued and approved

428 Pressure Vessel were selected for inspection(for an inspection interval of 8 years)

Until now, 44 Pressure Vessel were inspected(first year)

Current Status

• SI-01365-P67, Supports and Snubbers In-ServiceInspection Program issued and approved

• Until now, 179 supports and snubbers wereinspected, on 9 piping systems

• Approx. 100 supports will be inspected during2000 outage.

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3.; Erosion / Corrosiont-Servk# Inspection Program

<£>.Tli^Btirooseof this program is to detect damagesbefore w^navi & break-downThis prograrii is required to detect and monitor theerosion / corrosion phenomena, in order to ensurethe integrity of piping systems during the plant life

This program will be applied mainly on secondaryside in the T/B (pipes, reductions, elbows, Ts andvalves)

Current Status

SI-01365-P65, Main Steam Lines In-ServiceInspection Program issued and approved.132 pipe supports and 39 pipe welds wereselected for inspection.Approx. 50% from this in-service program iscompleted.

Qualification of ISI systems inCernavoda N.P.P.

I Qualification of equipment

I Qualification procedures and techniques

I Qualification of personnel

Qualification of the equipment

:•> Since Cemavoda NPP does not performNDT services for external organizationsthe qualification of the equipment isperformed in our metrological lab.

<•> Certification interval - one year

<•> Special equipment is qualified by theNational Institute of Metrology

Qualifications of procedures

All the NDT procedures and techniquesused in ISI are approved by ISCIR(Romanian Regulatory Body forPressure Vessel and Lifting Equipment)and CNCAN (National Commission forNuclear Activities Control)

Qualification of personnel

I All personnel involved in ISI programsmust be qualified and certifiedaccording to ISCIR TechnicalPrescriptions CR 11/82(similar to SNT-TC-1 A)

I Level I - Level II - Level III

I Re-certification interval - up to 3 years

Final Qualification

Final qualification and licensing ofthe ISI systems is performed by

CNCAN (National Commission forNuclear Activities Control)